How to add text to a WPF Label in code?

I believe you want to set the Content property. This has more information on what is available to a label.

In normal winForms, value of Label object is changed by,

myLabel.Text= "Your desired string";

But in WPF Label control, you have to use .content property of Label control for example,

myLabel.Content= "Your desired string";

Try DesrLabel.Content. Its the WPF way.

You can use the Content property on pretty much all visual WPF controls to access the stuff inside them. There's a heirarchy of classes that the controls belong to, and any descendants of ContentControl will work in this way.